Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Registrant Name	CSS INDUSTRIES INC
Entity Central Index Key	0000020629
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Emerging Growth Company	false
Entity Shell Company	false
Smaller Reporting Company	true
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		8,852,852